Administration: Make all color schemes available when running from /src.

To run WordPress from /src you have to use the `--dev` flag which also builds the color scheme stylesheets thus the restriction is no longer required.

See #44492.
Fixes #50558.
Built from https://develop.svn.wordpress.org/trunk@48311


git-svn-id: http://core.svn.wordpress.org/trunk@48080 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/general-template.php

@@ -4384,11 +4384,6 @@ function register_admin_color_schemes() {
 		)
 	);
 
-	// Other color schemes are not available when running out of src.
-	if ( false !== strpos( get_bloginfo( 'version' ), '-src' ) ) {
-		return;
-	}
-
 	wp_admin_css_color(
 		'light',
 		_x( 'Light', 'admin color scheme' ),

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48310';
+$wp_version = '5.5-alpha-48311';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.